Preparing data for analysis

Question 1

3 questions to ask before analysing:

Answer 1

Why you are collecting the data?
What data you need to collect?
How you are going to use this data to answer those questions?

Question 2

Why are you collecting data?

Answer 2

Answering questions to satisfy some information need

Question 3

What data do you need?

Answer 3

Sampling

Question 4

How are you going to analyse the data?

Answer 4

Level of measurement and statistics

Question 5

3 levels of measurement

Answer 5

scale, ordinal, nominal

Question 6

Nominal data

Answer 6

represents frequencies within categories without any quantitative data and no ranking

Question 7

Ordinal data

Answer 7

represents categories with some ranking but the differences are not really known

Question 8

Scale data

Answer 8

is ordered and continuous with distance comparison (interval or ratio)

Question 9

Example of nominal data

Answer 9

male/female, marital status

Question 10

Example of ordinal data

Answer 10

BMI, income level, satisfaction rating

Question 11

Example of scale data

Answer 11

age, weight, speed, temperature